Calcium - blood test
Alternate Names : Ca+2, Serum calcium, Ca++
Normal Values
Normal values range from 8.5 to 10.2 mg/dL. Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What do Abnormal Results Mean?
Higher-than-normal levels may be due to: - Addison's disease
- Excessive vitamin D level
- Excessive calcium intake (also called milk-alkali syndrome)
- HIV/AIDS
- Hyperparathyroidism
- Infections that cause granulomas such as tuberculosis and certain fungal and mycobacterial infections
- Metastatic bone tumor
- Milk-alkali syndrome
- Multiple myeloma
- Overactive thyroid gland (hyperthyroidism) or too much thyroid hormone replacement medication
- Paget's disease
- Prolonged immobilization
- Sarcoidosis
- Tumors producing a parathyroid hormone-like substance
- Use of certain medications such as lithium, tamoxifen, and thiazides
Lower-than-normal levels may be due to: - Hypoparathyroidism
- Kidney failure
- Liver disease (decreased albumin production)
- Magnesium deficiency
- Malabsorption (inadequate absorption of nutrients from the intestinal tract)
- Osteomalacia
- Pancreatitis
- Rickets
- Vitamin D deficiency
Additional conditions under which the test may be performed:
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